Hard to tell what might be the real reason, but in the US of A:
50 years ago, 1 in 10 000, nowadays 1 in 90 children has some form
of autism. Luckily, mainly amongst those of Caribbean, African
or Asian descent. Especially common amongst Somalis of Sweden
and the USA. Almost non-existent in
Er, study from 2007, though it apparently has been cited 81 times since then
according to google scholar, which is a respectable number.
The consensus so far on autism and such things is that if a family has history
of autism, inflammatory responses in the mother during pregnancy are going to
